我有这句话在 HQL 中可以正确运行:
字符串查询字符串=
"SELECT gmr.id.expedientId.idEns as idEns,"
+ " gmr.id.expedientId.anyExp as anyExp,"
+ " gmr.id.expedientId.numExp as numExp,"
+ " gmr.id.numOrdre as numOrdre,"
+ " gmr.idRecursRebuig.desRecursRebuig as descripcioRebuig,"
+ " gmr.desAmpliRebuig as observacionsRebuig,"
+ " gmr.tipusRebuig as tipusRebuig"
+ " FROM GirMotiuRebuig gmr"
+ " where gmr.id.expedientId.idEns =:idEns and"
+ " gmr.id.expedientId.anyExp =:anyExp and"
+ " gmr.id.expedientId.numExp =:numExp"
+ " ORDER BY gmr.id.numOrdre";
Query queryObject = getSessionFactory().getCurrentSession()
.createQuery(queryString);
queryObject.setResultTransformer(Transformers
.aliasToBean(MotiusRebuig.class));
queryObject.setParameter("idEns",clauExpedient.getIdEns());
queryObject.setParameter("anyExp",clauExpedient.getAnyExp());
queryObject.setParameter("numExp",clauExpedient.getNumExp());
llistaMotiusRebuig =queryObject.list();
和我的标准版本:
Criteria consulta = this.getSessionFactory().getCurrentSession()
.createCriteria(GirMotiuRebuig.class)
.add(Restrictions.eq("id.expedientId.idEns", clauExpedient.getIdEns()))
.add(Restrictions.eq("id.expedientId.anyExp", clauExpedient.getAnyExp()))
.add(Restrictions.eq("id.expedientId.numExp", clauExpedient.getNumExp()))
.addOrder(Order.asc("id.numOrdre"))
.setProjection(Projections.projectionList()
.add(Projections.property("id.expedientId.idEns"),"idEns")
.add(Projections.property("id.expedientId.anyExp"),"anyExp")
.add(Projections.property("id.expedientId.numExp"),"numExp")
.add(Projections.property("id.numOrdre"),"numOrdre")
.add(Projections.property("idRecursRebuig.desRecursRebuig"),"descripcioRebuig")
.add(Projections.property("desAmpliRebuig"),"observacionsRebuig")
.add(Projections.property("tipusRebuig"),"tipusRebuig")
.add(Projections.property("expedientId.numOrdre"),"numOrdre"))
.setResultTransformer(
Transformers.aliasToBean(MotiusRebuig.class));
llistaMotiusRebuig = consulta.list();
还有异常(exception):
Caused by: org.hibernate.QueryException: could not resolve property: idRecursRebuig.desRecursRebuig of: cat.base.gir.logica.domini.impl.GirMotiuRebuig
at org.hibernate.persister.entity.AbstractPropertyMapping.propertyException(AbstractPropertyMapping.java:44)
at org.hibernate.persister.entity.AbstractPropertyMapping.toType(AbstractPropertyMapping.java:38)
at org.hibernate.persister.entity.AbstractEntityPersister.toType(AbstractEntityPersister.java:1362)
at org.hibernate.loader.criteria.CriteriaQueryTranslator.getType(CriteriaQueryTranslator.java:477)
at org.hibernate.criterion.PropertyProjection.getTypes(PropertyProjection.java:36)
at org.hibernate.criterion.AliasedProjection.getTypes(AliasedProjection.java:37)
at org.hibernate.criterion.ProjectionList.getTypes(ProjectionList.java:38)
at org.hibernate.loader.criteria.CriteriaQueryTranslator.getProjectedTypes(CriteriaQueryTranslator.java:318)
at org.hibernate.loader.criteria.CriteriaJoinWalker.<init>(CriteriaJoinWalker.java:77)
at org.hibernate.loader.criteria.CriteriaJoinWalker.<init>(CriteriaJoinWalker.java:59)
at org.hibernate.loader.criteria.CriteriaLoader.<init>(CriteriaLoader.java:67)
at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1550)
at org.hibernate.impl.CriteriaImpl.list(CriteriaImpl.java:283)
at cat.base.gir.dao.GirMotiuRebuigDao.obtenirMotiusRebuig(GirMotiuRebuigDao.java:73)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:307)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:182)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:149)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:106)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
at $Proxy1183.obtenirMotiusRebuig(Unknown Source)
at cat.base.gir.serveis.GirRecursService.obtenirMotiusRebuig(GirRecursService.java:381)
... 127 more
实体:GirMotiuRebuig
@Entity
@Table(name = "gir_exp_motiu_rebuig")
public class GirMotiuRebuig implements IGirMotiuRebuig {
/**
*
*/
private static final long serialVersionUID = -5587115692447683913L;
private ExpedientIdMultiple id;
private MRecursRebuig idRecursRebuig;
private String desAmpliRebuig;
private GirExpedient expedientGir;
protected Integer tipusRebuig;
public GirMotiuRebuig() {
}
public GirMotiuRebuig(ExpedientIdMultiple id, MRecursRebuig idRecursRebuig, String desAmpliRebuig,
GirExpedient expedientGir) {
this.id = id;
this.idRecursRebuig = idRecursRebuig;
this.desAmpliRebuig = desAmpliRebuig;
this.expedientGir = expedientGir;
}
@EmbeddedId
@AttributeOverrides( {
@AttributeOverride(name = "expedientId.idEns", column = @Column(name = "id_ens", nullable = false, precision = 5, scale = 0)),
@AttributeOverride(name = "expedientId.anyExp", column = @Column(name = "any_exp", nullable = false, precision = 4, scale = 0)),
@AttributeOverride(name = "expedientId.numExp", column = @Column(name = "num_exp", nullable = false, precision = 10, scale = 0)),
@AttributeOverride(name = "numOrdre", column = @Column(name = "num_ordre", nullable = false, precision = 10, scale = 0)) })
public ExpedientIdMultiple getId() {
return id;
}
public void setId(ExpedientIdMultiple id) {
this.id = id;
}
@OneToOne(fetch = FetchType.LAZY)
@JoinColumn(name = "id_recurs_rebuig")
public MRecursRebuig getIdRecursRebuig() {
return idRecursRebuig;
}
public void setIdRecursRebuig(MRecursRebuig idRecursRebuig) {
this.idRecursRebuig = idRecursRebuig;
}
@Column(name = "des_ampli_rebuig", nullable = false, length = 250)
public String getDesAmpliRebuig() {
return desAmpliRebuig;
}
public void setDesAmpliRebuig(String desAmpliRebuig) {
this.desAmpliRebuig = desAmpliRebuig;
}
@ManyToOne(fetch = FetchType.LAZY)
@JoinColumns( {
@JoinColumn(name = "id_ens", referencedColumnName = "id_ens", nullable = false, insertable = false, updatable = false),
@JoinColumn(name = "any_exp", referencedColumnName = "any_exp", nullable = false, insertable = false, updatable = false),
@JoinColumn(name = "num_exp", referencedColumnName = "num_exp", nullable = false, insertable = false, updatable = false) })
public GirExpedient getExpedientGir() {
return expedientGir;
}
public void setExpedientGir(GirExpedient expedientGir) {
this.expedientGir = expedientGir;
}
@Column(name = "tipus_rebuig", nullable = false)
public Integer getTipusRebuig() {
return tipusRebuig;
}
public void setTipusRebuig(Integer tipusRebuig) {
this.tipusRebuig = tipusRebuig;
}
嗯，这个标准有效:
Criteria consulta = this.getSessionFactory().getCurrentSession()
.createCriteria(GirMotiuRebuig.class, "g")
.add(Restrictions.eq("g.id.expedientId.idEns", clauExpedient.getIdEns()))
.add(Restrictions.eq("g.id.expedientId.anyExp", clauExpedient.getAnyExp()))
.add(Restrictions.eq("g.id.expedientId.numExp", clauExpedient.getNumExp()))
.addOrder(Order.asc("g.id.numOrdre"))
.setProjection(Projections.projectionList()
.add(Projections.property("g.id.expedientId.idEns"),"idEns")
.add(Projections.property("g.id.expedientId.anyExp"),"anyExp")
.add(Projections.property("g.id.expedientId.numExp"),"numExp")
.add(Projections.property("g.desAmpliRebuig"),"observacionsRebuig")
.add(Projections.property("g.id.numOrdre"),"numOrdre")
.add(Projections.property("g.tipusRebuig"),"tipusRebuig")
)
.setResultTransformer(
Transformers.aliasToBean(MotiusRebuig.class));
llistaMotiusRebuig = consulta.list();
但是当我尝试攻击“idRecursRebuig.desRecursRebuig as descripcioRebuig”时 像:
Criteria consulta = this.getSessionFactory().getCurrentSession()
.createCriteria(GirMotiuRebuig.class, "g")
.add(Restrictions.eq("g.id.expedientId.idEns", clauExpedient.getIdEns()))
.add(Restrictions.eq("g.id.expedientId.anyExp", clauExpedient.getAnyExp()))
.add(Restrictions.eq("g.id.expedientId.numExp", clauExpedient.getNumExp()))
.addOrder(Order.asc("g.id.numOrdre"))
.setProjection(Projections.projectionList()
.add(Projections.property("g.id.expedientId.idEns"),"idEns")
.add(Projections.property("g.id.expedientId.anyExp"),"anyExp")
.add(Projections.property("g.id.expedientId.numExp"),"numExp")
.add(Projections.property("g.desAmpliRebuig"),"observacionsRebuig")
.add(Projections.property("g.id.numOrdre"),"numOrdre")
.add(Projections.property("g.tipusRebuig"),"tipusRebuig")
**.add(Projections.property("g.idRecursRebuig.desRecursRebuig"),"descripcioRebuig")**
)
.setResultTransformer(
Transformers.aliasToBean(MotiusRebuig.class));
llistaMotiusRebuig = consulta.list();
查询失败...
nested exception is org.hibernate.QueryException: could not resolve property: idRecursRebuig.desRecursRebuig of: cat.base.gir.logica.domini.impl.GirMotiuRebuig
所以:问题是当我尝试恢复 idRecurs...所以..我需要额外的咖啡因...
这是 MRecursRebuig 的映射:
@Entity
@Table(name = "MRecursRebuig")
public class MRecursRebuig implements IMRecursRebuig {
/**
*
*/
private static final long serialVersionUID = 7439723582297629986L;
private Integer idRecursRebuig;
private String desRecursRebuig;
private Integer tipusRebuig;
public MRecursRebuig() {
}
public MRecursRebuig(Integer idRecursRebuig, String desRecursRebuig) {
this.idRecursRebuig = idRecursRebuig;
this.desRecursRebuig = desRecursRebuig;
}
@Id
@Column(name = "id_recurs_rebuig", unique = true, nullable = false, precision = 22, scale = 0)
public Integer getIdRecursRebuig() {
return idRecursRebuig;
}
public void setIdRecursRebuig(Integer idRecursRebuig) {
this.idRecursRebuig = idRecursRebuig;
}
@Column(name = "des_recurs_rebuig", nullable = false, length = 100)
public String getDesRecursRebuig() {
return desRecursRebuig;
}
public void setDesRecursRebuig(String desRecursRebuig) {
this.desRecursRebuig = desRecursRebuig;
}
@Column(name = "tipus_rebuig", nullable = false)
public Integer getTipusRebuig() {
return tipusRebuig;
}
如果我尝试这个:
Criteria consulta = this.getSessionFactory().getCurrentSession()
.createCriteria(GirMotiuRebuig.class, "g")
.createAlias("g.idRecursRebuig", "idRecursRebuig")
.add(Restrictions.eq("g.id.expedientId.idEns", clauExpedient.getIdEns()))
.add(Restrictions.eq("g.id.expedientId.anyExp", clauExpedient.getAnyExp()))
.add(Restrictions.eq("g.id.expedientId.numExp", clauExpedient.getNumExp()))
.add(Restrictions.eq("g.idRecursRebuig", clauExpedient.getNumExp()))
.addOrder(Order.asc("g.id.numOrdre"))
.setProjection(Projections.projectionList()
.add(Projections.property("g.id.expedientId.idEns"),"idEns")
.add(Projections.property("g.id.expedientId.anyExp"),"anyExp")
.add(Projections.property("g.id.expedientId.numExp"),"numExp")
.add(Projections.property("g.desAmpliRebuig"),"observacionsRebuig")
.add(Projections.property("g.id.numOrdre"),"numOrdre")
.add(Projections.property("g.tipusRebuig"),"tipusRebuig")
**.add(Projections.property("idRecursRebuig.desRecursRebuig"),"descripcioRebuig")**
)
.setResultTransformer(
Transformers.aliasToBean(MotiusRebuig.class));
llistaMotiusRebuig = consulta.list();
我收到:
nested exception is org.hibernate.PropertyAccessException: IllegalArgumentException occurred calling getter of cat.base.gir.logica.domini.impl.MRecursRebuig.idRecursRebuig
cat.base.gir.serveis.GirRecursService.obtenirMotiusRebuig(GirRecursService.java:387)
最佳答案
在 HQL 查询中，当您有类似的内容时
select entityA.entityB.foo from EntityA entityA ...
您实际上是在 EntityA 和 EntityB 之间创建隐式内部联接。相当于
select entityB.foo from EntityA entityA
inner join entityA.entityB entityB ...
在 Criteria 查询中，您无法像在 HQL 中那样链接属性。相反，每次需要连接时，您都必须使用 subCriteria 或(我的偏好)别名显式创建它。所以你需要做
Criteria consulta = this.getSessionFactory().getCurrentSession()
.createCriteria(GirMotiuRebuig.class, "girMotiuRebuig")
.createAlias("girMotiuRebuig.id.expedientId", "expedient")
.add(Restrictions.eq("expedient.idEns", clauExpedient.getIdEns()))
...
请注意，您的设计和命名使您的代码难以理解。您应该无论如何避免使用复合键，并且您不应该将 idRecursRebuig 命名为实际上是 MRecursRebuig 实例的字段，而根本不是 ID。
关于java - Hql查询转Criteria查询，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/22074729/